<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>多类名选择器</title>
    <style>
        .font20{
            font-size: 20px;
        }
        .font14{
            font-size: 14px;
        }
        .pink{
            color: pink;
        }
    </style>
</head>
<body>
    <div class="font20 pink">亚瑟</div>
    <div class="font20">刘备</div>
    <div class="font14 pink">安其拉</div>
    <div class="font14">貂蝉</div>
</body>
</html>